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OEIS A000193: Nearest integer to log n

Author
Mike Breault
Published
Sun 13 Apr 2025
Episode Link
None

In this episode we zoom in on OEIS A000193—the nearest integer to the natural logarithm of n. Watch how the slow growth of ln(n) creates long plateaus and occasional jumps as n increases, and see how the sequence encodes rounding to the nearest integer in a discrete setting. We'll review the first terms, discuss why those plateaus occur, and explore what the entry teaches about connecting a smooth function to integers. We'll also tour the OEIS page, highlighting the practical code snippets (Maple, Mathematica, Pari/GP, Haskell, and more) that let you compute the sequence and experiment yourself. Plus, we’ll map how A000193 relates to other sequences through cross-references, and reflect on the community and the indispensable support of the OEIS Foundation that keeps this living library up to date. Finally, we’ll pose a thought‑provoking question: how would the plateau/jump pattern change if we used log bases other than e? A concise, student‑friendly window into computation, theory, and the interconnected world of integer sequences.


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